Sewing machine



FIG. 1 is a front elevation of the sewing machine showing our new design;

FIG. 2 is a plan view thereof;

FIG. 3 is an underside plan view thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is an end elevation thereof taken from the left-hand side of FIG. 1;

FIG. 6 is an end elevation thereof taken from the right-hand side of FIG. 1; and,

FIG. 7 is a perspective elevation thereof. 

The ornamental design for a sewing machine, as shown. 